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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 19-23 (21) days






2. Milk ~305 days - dry 60 days prior to calving






3. 10-37 (21) days






4. Animals which have only one estrous cycle (ex: dog - fox)






5. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






6. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






7. Depository for semen during insemination. where urine leaves the body






8. Animals which have many estrous periods per year (ex: cow - sow)






9. Male on one pin and female on other side






10. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






11. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






12. (LH) stimulates the Leydig cells to produce testosterone






13. Days which have decreasing daylight hours


14. When are dairy cattle dehorned?






15. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






16. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






17. Actual heat cycle (period)






18. Can survive ~7 days in cow. vast majority <48 hours






19. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






20. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






21. FEED






22. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






23. Microscopic - make sure not sterile - very few bulls are actually tested






24. Milk is 15% ________ and 85% __________.






25. 30 hours after estrus begins






26. Provide nourishment for the developing sperm






27. (LH) stimulates the Leydig cells to produce testosterone






28. Birthing process (termination of gestation)






29. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






30. (male) pushes the testes outward toward the legs for a cool-down off of the body






31. What makes the milk flow through the mammary glands?






32. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






33. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






34. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






35. Luteolysis happens because of the ____________ hormone






36. 336 days






37. 283 days






38. 1-3 days






39. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






40. 1-3 days






41. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






42. Days which have decreasing daylight hours


43. Important 'landmark' during palpation






44. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






45. (FSH) causes egg to mature in females






46. When are dairy cattle dehorned?






47. Way to know everything is alright with the breeding male






48. Produce testosterone. located between the seminiferous tubules






49. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






50. 265-285 days